#453: Bump version to 0.9

[DronMDF]

No description provided.

[codecov]

Codecov Report

Merging #463 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #463      +/-   ##
==========================================
- Coverage   94.77%   94.72%   -0.06%     
==========================================
  Files          88       89       +1     
  Lines         900      910      +10     
==========================================
+ Hits          853      862       +9     
- Misses         47       48       +1     

Impacted Files	Coverage Δ
2out/Match.h	0.00% <0.00%> (-100.00%)	⬇️
2out/NamedTest.h	50.00% <0.00%> (-50.00%)	⬇️
2out/dirty/Test.h	100.00% <0.00%> (ø)
2out/MatchTest.h	100.00% <0.00%> (ø)
2out/ContainTest.h	100.00% <0.00%> (+100.00%)	⬆️

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